★★★★★ 5
Alpha one gen I
Good fit
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 1, 2026
Oatey 4 In. PVC Backwater Valve
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Oatey 4 In. PVC Backwater ValveElastomeric seal in quick action flapper ensures a watertight seal Threaded access cap incorporates a neoprene seal for positive sealing & can be tightened or removed by hand Valve hub fits DWV pipe & can be adapted for sewer & drain pipe
Quick Dispatch:
Your Oatey 4 In. PVC Backwater Valve orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
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4.7 ★★★★★
Based on 1283 reviews
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Product Reviews
★★★★★ 5
Quality for the price
All necessary parts good quality
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Reviewed in the United States on March 16, 2026
★★★★★ 5
quality
prefect fit, best pricing over local outlets wanting twice as much
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Reviewed in the United States on February 19, 2026
★★★★★ 3
Ok
Not bad not great. Quality feels cheap.
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Reviewed in the United States on December 30, 2025
★★★★★ 5
Lower unit water pump
Worked fine
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Reviewed in the United States on October 16, 2025
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